2007 ICD-9-CM Procedure 31.43 Closed [endoscopic] biopsy of larynx 31.43 is a specific code that can be used to specify a procedure 31.43 contains 3 index entries View the full Volume 3 31.* hierarchy Index entries containing 31.43: Biopsy larynx 31.43 brush 31.43 closed (endoscopic) 31.43 open 31.45